搜索资源列表
HighConvert_Pwm
- 1.本文对一种高效的升压式PWM 变换电路作了分析研究 对开关状态的切换效率高 采用双零软开关工作,大大降低了开关损耗, 提 高了电路的转换效率. 2.该电路在高频的开关电源、逆变器等电力电子电路上有很大的实用价值, 可以提高电路的转换效率. -1. In this paper, an efficient step-up PWM conversion circuit analysis study on the switch to switch the state of high effi
The_most_basic_concepts_of_computer_networks(1).ra
- 计算机网络最基本概念之一:1. 引言 2. 重要术语 3. 电路交换与分组交换 4. IP 协议与 TCP 协议 5. 客户服务器方式 6. 结束语-One of the most basic concepts of computer networks: 1. Introduction 2. Key terminology 3. Circuit switching and packet switching 4. IP protocol and TCP protocol 5.
TINY_PLANET_software
- Tiny Planet is small device connected to a GSM cell phone. When the mobile receives a predefined SMS (text message), like "Activate burglar alarm" or "Start backup pump", the circuit automatically recognizes it as a command, and switches the output p
IntroductiontoWANTechnolgies
- • Become familiar with WAN terminology. • Learn about different types of WAN connections. • Become familiar with different types of WAN equipment. Introduction to WAN Technologies This chapter introduces the various protocols a
jidianqi
- 继电器广泛用于生产控制的电力系统中,其作用是利用它的常闭 和常开触点进行电路切换。由于继电器是利用改变金属触点位置,使 动触点和定触点闭合或分开,所以具有接触电阻小,流过电流大和耐 压高等优点,特别适用于大电流高电压的使用场合。小型继电器也常 用作精密测量电路的转换开关。-Relays are widely used in electricity production control system, its role is to make use
3
- 利用Matlab中的simulink工具箱仿真。单相桥式PWM逆变电路,采用单极性触发方式,负载 ,电源 ,建立模型,制作PWM触发模块,画出基波幅值与占空比关系图。-Using simulink toolbox of Matlab simulation. Single-phase PWM bridge inverter circuit, the use of unipolar trigger mode, load, power, establishment of model, trigger
1
- 利用反控制法构造了1 个新的混沌系统,分析新系统的平衡点及在平衡点的特征值,分形维数,L yapunov 指数 等性质,设计1 个由2 个混沌系统组成的可切换的实际电路并进行实验,通过1 个开关选择器,电路可以实现2 个子系统 的功能,观察到2 个子系统在各个相平面的混沌吸引子。-Use of anti-control method to construct a new chaotic system to analyze the new system equilibrium point
huibian
- 采用DS18B20温度传感器和AT89C51单片机实现温度的检测,并结合MAX232的电路实现与PC机进行数据通信。另外在拨码开关的结合下进行电路的工作模式切换,可实现电子秒表和电子时钟的附加功能。-Using DS18B20 temperature sensors and AT89C51 MCU temperature detection and integrated circuit MAX232 Implementation and PC machine data communication
Modernexchangetheory
- 现代交换原理:1. 概论 2. 交换单元与交换网络 3. 电路交换技术及接口 4. 存储程序控制原理 5. 分组交换与帧中继技术 6. 信令系统 7. ATM交换技术 8. 路由器及IP交换技术 9. 光交换技术 10.软交换技术 -Modern exchange theory: 1. Introduction 2. Switching unit and the switching network 3. Circuit switching and inte
25
- The understanding of the switching procedure of an IGBT requires a more detailed descr iption. It is very similar to a MOSFET. The main difference occurs at turn-off when a current tail appears, see Figure 2.2 [5]. When turning on, a positive v
amba
- 本章介绍一系统芯片的整合平台,此平台架构主要建立在AMBA的总线协议上。AMBA协议是ARM 公司发表的总线标准,本章主要介绍 AMBA的 AHB协议。AHB总线与一般总线(circuit switching bus)的不同地方,在于支持分割传送。分割传送的机制比一般总线的传送机制还要复杂,将是本章介绍重点。-The product described in this document is subject to continuous developments and improvements.
Switching-power-supply
- 详细讲述开关电源的组成部分、各部分电路功能及原理-Detailed account of the switching power supply part of the function of each part of the circuit and the principle
dianzifuzai
- 主控电路包含了12位的数模转换芯片tlc5618和10位的模数转换芯片tlc1549对恒压和恒流模块电路进行采样经过AT89S52单片机可实现恒压模式下设计2-15V范围的设定和0.01v的步进;恒流模式下实现0.1-2A的范围设定和0.01A的步进。恒压和恒流模块电路采用OP07运放(或UA741)、康铜丝电阻和开关管IRF540组成恒压及恒流的负载电路。继电器电路可实现工作模式的切换。-Control circuit includes a 12-bit digital-analog conv
power-protect
- 电源保护 电源设计 开关电源设计保护电路-Protection circuit switching power supply design
DC-power-supply
- 设计目标:完成输入:+12VDC或者220VAC;输出: 50V两路,每路输出达4A; 15V两路,输出电流无特殊要求; 12V两路,输出电流无特殊要求。所有输出电压只有正误差,无负误差,50V误差范围为+5V以内,其他两路的误差范围在+10 以内的设计,用PROTEL 99SE绘制系统电路原理图。-The design of the circuit from the input circuit, converter, control circuit, the output circuit of
10-Circuit-Packet
- Circuit Packet Switching
constant-current-circuit-design
- 介绍了几种恒流源电路的设计,包括线性恒流源、开关恒流源、集成稳压器恒流源的结构原理及特点。-Describes several constant current source circuit design, including linear constant current source, switching constant current source, an integrated voltage regulator current source and characteristics of
STATCOM--main-circuit-device-design
- 电力系统中要求电压稳定度和无功功率满足一定的技术指标,利用带独立直流电源的级 联式多电平逆变器和多电平逆变器最优化谐波台阶式调制技术(OHSW)设计的STATCOM装置, 可以使电力系统中的电压得到稳定以及无功功率和谐波得到有效补偿。本文主要介绍了STAT- COM装置主电路的设计,主电路是STATCOM装置与系统进行交换有功功率与无功功率的环节。 该装置具有输出谐波含量低、损耗小、性能可靠等优点。-Requirements of power system voltage sta
Switching-power-supply-circuit
- 开关电源电路Switching power supply circuit-Switching power supply circuit
Packet-and-Circuit-Switching
- Packet and Circuit Switching for engineer